Pulpifying tank with filtering function

Abstract

The utility model relates to the technical field of nickel sulfide leaching raw material pretreatment, in particular to a slurrying tank with a filtering function. The slurrying tank comprises the filter cage, the tubular filter, the fixed flange, the connecting pipe, the connecting flange and the slurrying tank body, the filter cage is arranged at the outlet of the bottom of the slurrying tank body, the tubular filter is arranged in the filter cage, and various impurities brought in in the slurrying process are blocked outside the filter cage, so that the impurities are prevented from entering the slurrying tank body. And the possibility that large-particle raw materials enter a tank outlet pipeline and a valve is reduced. The height of the filter cage is close to the lower edge of the stirring paddle, so that even if the materials are too far away from the stirring paddle and cannot be influenced by rotational flow, and a small amount of raw materials are deposited at the bottom of the slurrying tank, ore pulp can flow into the filter cage from the top filter screen of the filter cage without blocking the filter; the nickel sulfide ore pulp produced after slurrying is ensured to meet the production requirements, the continuity of ore pulp outflow is ensured, and the blockage failure rate of a conveying pump is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of nickel sulfide leaching raw material pretreatment, in particular to a slurrying tank with a filtering function. Background Art

[0002] In the pressurized hydrometallurgical industry, the pressurized leaching process used for nickel leaching currently widely adopts the method of first normal pressure and then pressurization to leach nickel from the raw materials. Leaching tanks are mostly made of steel lining bricks to prevent the slurry from corroding the tanks. Before the raw materials enter the normal pressure leaching process, they must first be slurried, and the mineral powder is added to a mixed solution of water, acid, and nickel sulfate solution. Because the raw materials will inevitably be mixed with some debris such as packaging bags, large particles or materials during transportation and packaging, if these debris enter the tank outlet pipe or valve, it is very easy to cause valve obstruction or pipe blockage. Therefore, it is necessary to perform a filtration before the slurried nickel sulfide slurry flows out of the tank to reduce the possibility of debris entering the outlet pipe and valve, thereby reducing the chance of blockage.

[0003] The existing problems in the slurry filtration of nickel sulfide ore slurry are:

[0004] (1) The front-end material screening is not fine, and the pulping slurry contains many large particles or packaging bag fragments, which are easy to block the pulping tank outlet pipe and valve.

[0005] (2) The stirring intensity is not enough or the material is too far away from the stirring after sinking to the bottom. The specific gravity of the raw materials is high, and some of the raw materials are deposited at the bottom of the slurry tank to form silt, which is easy to clog the filter and outlet pipe. Utility Model Content

[0006] In order to solve the problems existing in the prior art, a slurry tank with filtering function is provided, which can screen the materials in detail at the front end and will not cause the raw materials to be deposited at the bottom of the slurry tank to form siltation due to insufficient stirring intensity or the material sinking to the bottom and being too far away from the stirring, thereby clogging the traditional filter and the outlet pipe.

[0007] A slurry tank with a filtering function comprises: a filter cage, a tubular filter, a fixed flange, a connecting pipe, a connecting flange, and a slurry tank, wherein the filter cage is composed of a top filter screen, a front filter screen, a U-shaped filter screen and a bottom plate, the tubular filter comprises an outer filter tube and an inner filter tube, the slurry tank is a cylindrical tank body, a stirring paddle is movably connected to the slurry tank, a tank outlet is provided at the bottom of the slurry tank, and a tank outlet flange is fixed at the tank outlet; the bottom plate of the filter cage is fixed to the bottom of the slurry tank via bolts, the arc surface of the U-shaped filter screen is fitted with the side wall curved surface of the tank outlet of the slurry tank, the front filter screen does not exceed the left and right edges of the stirring paddle in the horizontal direction, the root of the tubular filter is fixedly connected to the fixed flange, the fixed flange is connected to the tank outlet flange by bolts, the fixed flange, the connecting pipe and the connecting flange are connected in sequence by welding, and the front end of the tubular filter extends into the filter cage at the bottom of the slurry tank.

[0008] Furthermore, the top filter screen and the front filter screen are provided with holes of the same aperture size, and the hole size is φ6-12mm.

[0009] Furthermore, the height of the filter cage does not exceed the lower edge of the stirring paddle.

[0010] Furthermore, the top filter screen, the front filter screen, the U-shaped filter screen and the bottom plate of the filter cage are connected by welding.

[0011] Furthermore, the distance between the outer filter tube and the inner filter tube of the tubular filter is 1.5-2.5 mm, and the hole size of the outer filter tube and the inner filter tube is the same, which is φ6-12 mm.

[0012] Furthermore, the front end of the tubular filter extends into the filter cage at the bottom of the slurry tank by 40-60 cm.

[0013] The beneficial effects of the utility model are as follows: the slurrying tank with filtering function of the utility model blocks various impurities brought into the nickel sulfide slurry during the slurrying process outside the filter cage through the filtering of the filter cage and the tubular filter, thereby reducing the possibility of large-particle raw materials entering the tank outlet pipe and valve. Even if the material is deposited due to being too far away from the stirring paddle and cannot be affected by the vortex, the slurry can still flow into the filter cage normally without clogging the filter, and further without clogging the outlet and valve, thereby ensuring that the nickel sulfide slurry produced after slurrying meets the production requirements, ensuring the continuity of the slurry outflow, and reducing the jamming failure rate of the delivery pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further describes the embodiments of the present invention with reference to the accompanying drawings, wherein:

[0015] Figure 1 Shows the three structural views of the filter cage;

[0016] Figure 2 Shows a schematic diagram of the structure of the tubular filter and the fixed flange, connecting pipe, and connecting flange;

[0017] Figure 3 The overall structural diagram of the pulping tank with filtering function is shown.

[0018] Among them, 1. filter cage, 11. top filter screen, 12. front filter screen, 13. U-shaped filter screen, 14. bottom plate, 2. tubular filter, 21. outer filter tube, 22. inner filter tube, 3. fixed flange, 4. connecting pipe, 5. connecting flange, 6. slurry tank. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] like Figure 1-3 As shown, a slurry tank with a filtering function includes: a filter cage 1, a tubular filter 2, a fixed flange 3, a connecting pipe 4, a connecting flange 5, and a slurry tank 6. The filter cage 1 is composed of a top filter screen 11, a front filter screen 12, a U-shaped filter screen 13 and a bottom plate 14. The top filter screen, the front filter screen and the U-shaped filter screen are all distributed with φ10mm holes. The tubular filter 2 includes an outer filter tube and an inner filter tube. The distance between the outer filter tube and the inner filter tube is 2mm. The hole size of the two filter tubes is the same as the hole size of the filter cage, and φ10mm holes are evenly distributed. The slurry tank 6 is a cylindrical tank body. The top of the slurry tank 6 is movably connected to a stirring paddle. A tank outlet is provided at the bottom of the tank 6, where a tank outlet flange is fixed. The bottom plate of the filter cage 1 is bolted to the bottom of the slurry tank 6. The curved surface of the U-shaped filter screen 13 mates with the curved sidewall of the tank outlet of the slurry tank 6. The front filter screen 12 does not exceed the left and right edges of the stirring paddle in the horizontal direction. The height of the filter cage is flush with the bottom edge of the stirring paddle. The roots of the outer and inner filter tubes of the tubular filter 2 are welded to the fixed flange 3, which is bolted to the tank outlet flange. The fixed flange 3, connecting pipe 4, and connecting flange 5 are welded in sequence. The front end of the tubular filter 2 extends into the filter cage 1 at the bottom of the slurry tank 6. When in use, the filter cage 1 is first placed on the bottom of the slurry tank 6, aligning it with the sidewall. Then, expansion bolts are inserted through two φ15mm holes in the bottom plate 14 and driven into the anti-corrosion bricks at the bottom of the slurry tank 6 to secure it. The fixed flange 3 is bolted to the tank outlet flange of the slurry tank 6. The tubular filter 2 extends 50cm into the inner wall of the slurry tank 6. The device is made entirely of 316L stainless steel.

[0021] When the material is slurried, the filter cage 1 can perform the first filtration to block most of the large particles. The slurry entering the filter cage 1 is then filtered through the outer filter tube 21 and the inner filter tube 22 of the tubular filter 2 to ensure that there is basically no debris that may cause blockage or obstruction of the discharge pipe, valve or delivery pump. If the material has a large specific gravity, the bottom will be piled up due to the material. Because the top filter screen 11 of the outer filter cage 1 is at a high height, the material near this place will always be affected by the vortex generated by the stirring and will not be deposited and clog the top filter screen 11 of the filter cage 1. Therefore, even if the material is piled up high, the slurry can still flow through the top filter screen 11 to the tubular filter 2 and then out of the slurry tank 6, reducing the chance of blockage.

[0022] Some exemplary embodiments of the present invention are described above. It will be understood that the above embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention. The features in these embodiments can be recombined in an appropriate manner, and the solutions obtained thereby are still within the scope of protection claimed by the present invention. Based on the above embodiments, all other embodiments obtained by those skilled in the art without making any creative work, that is, all modifications, equivalent substitutions and improvements made within the spirit and principles of this application, fall within the scope of protection claimed by the present invention.

Claims

1. A pulping tank with filtering function, characterized in that: include: A filter cage (1), a tubular filter (2), a fixed flange (3), a connecting pipe (4), a connecting flange (5), and a slurry tank (6). The filter cage (1) is composed of a top filter screen (11), a front filter screen (12), a U-shaped filter screen (13), and a bottom plate (14). The tubular filter (2) includes an outer filter tube and an inner filter tube. The slurry tank (6) is a cylindrical tank body. A stirring paddle is movably connected in the slurry tank (6). A tank outlet is provided at the bottom of the slurry tank (6). A tank outlet flange is fixed at the tank outlet. The bottom of the filter cage (1) is provided with a plurality of screws. The plate is fixed to the bottom of the slurry tank (6) by bolts, the arc surface of the U-shaped filter screen (13) is in contact with the curved surface of the side wall of the slurry tank (6) where the tank outlet is opened, the front filter screen (12) does not exceed the left and right edges of the stirring paddle in the horizontal direction, the root of the tubular filter (2) is fixedly connected to the fixed flange (3), the fixed flange (3) is connected to the tank outlet flange by bolts, the fixed flange (3), the connecting pipe (4), and the connecting flange (5) are connected in sequence by welding, and the front end of the tubular filter (2) extends into the filter cage (1) at the bottom of the slurry tank (6).

2. A pulping tank with filtering function according to claim 1, characterized in that: The top filter screen (11) and the front filter screen (12) are provided with holes of the same diameter, and the hole size is φ6-12 mm.

3. The pulping tank with filtering function according to claim 1, characterized in that: The height of the filter cage (1) does not exceed the lower edge of the stirring paddle.

4. The pulping tank with filtering function according to claim 1, characterized in that: The top filter screen (11), the front filter screen (12), the U-shaped filter screen (13) and the bottom plate (14) of the filter cage (1) are connected by welding.

5. The pulping tank with filtering function according to claim 1, characterized in that: The distance between the outer filter tube and the inner filter tube of the tubular filter (2) is 1.5-2.5 mm, and the hole size of the outer filter tube and the inner filter tube is the same, which is φ6-12 mm.

6. The pulping tank with filtering function according to claim 1, characterized in that: The front end of the tubular filter (2) extends 40-60 cm into the filter cage (1) at the bottom of the slurry tank (6).

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